Improvement in mill-gearing



JOSHUA C. CUNNINGHAM, OF OGLETHORPE, Letters PatentiNo. 70,970, dated November 19, 1867,

IMPROVEMENT IN MILL-GEARING.

@its tlghnle riferiti tu im there Enters tant mit. making part nf the ttm.

i 'ro ALL wHoM 1T MAY ooNoERN: l

e. Be it knownthat I, JOSHUAA C. CUNNINGHAM, of Oglethorpe, in the county of Macon, and State of Georgia,

have invented a new and usefulIlnprovement in Mill-Gearing; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and 'use the same,- referenceheinghad to the accompanyingdrawings, forming part of this specification, in which-J A Figure 1 is a side view of my improved gearing, part of one of thewheels being broken away to show the construction. i

Figure 2 is a horizontal section of the same, taken through the line a: x, fig. 1

Similar letters of reference indicate like parts.

My invention consists in the combination and arrangement'of the stationary base-wheel, the gear or pinionwheels, and the arms upon which they revolv eand the crown-wheel, with each other, and with the rnain or drivingsha`ft, as hereinafter more fully described, so as to obtain a greatly increased velocity at the expense of a( a very slight loss of power. i

' A is the base-wheel, which is. securelyl bolted to the bridge-tree D. is the main or drivingshaft, from which tnotion is communicated to the machinery-to bedriven, and the lower end of which is pivoted to the bridge-tree D in the ordinary manner.y The cog or pinion-wheels C revolve loosely upon journals formed upon i the arms F, which are framed togetheiggand through a holc in the centre of which the shaft E passes; the hole being suiiciently large to allow the armsd and'shaft E to move independently of each other. The ends ofthe A arras Fproject heyond the wheels C, as shown inthe drawings, and to these projecting ends-is securely attached the water-wheel, from which the motion is obtained. The wheels C are made with two sets of cogsor pinons, the one around the circumference of their outer ends, and the other around the circumference of their inner ends, as shown in the drawings. The inner set being of less diameter than the outer, and having a less number of c cgs, I usually make the inner set with twentycogs, and the outer set with twenty-four: B is the crown wheel, which is attached to and carries with it the shaft E, Upon thelower side ofthe wheel B is formed or to it is securely attached a setof cogs, which mesh into the inner set of`cogs ofthe wheels C, ns shown in iig. 1. I usually form the wheel B with `forty cogs, and the stationary hase-wheel A with fifty-six cogs', so that a single revolution of the arms F, 'to which the water-wheel is attached, will cause the wheel B and shaft E to revolve two and one-sixth times, thusgreatly increasing the velocity with which the machinery is driven without loss of' power, except the slight loss from lthe friction Iof the wheels C.

l v I claim as new, and' desire to secure by Letters Patent- .i The pinion-wheels C, each composed of two sets of eogs, and of unequal diameters, in combination with the hase A, crown-gear wheel B, and shafts F, all arranged and operatinig as described, for the Vpurpose specified.

Y JOSHUA C. CUNNINGHAM. Witnesses:

Taos. P. LoYD JNO. M. GREEK. 

